From: | "Christopher Kings-Lynne" <chriskl(at)familyhealth(dot)com(dot)au> |
---|---|
To: | "Beth Gatewood" <beth(at)vizxlabs(dot)com>, <josh(at)agliodbs(dot)com> |
Cc: | <pgsql-sql(at)postgresql(dot)org> |
Subject: | Re: make a unique index for foreign keys? |
Date: | 2002-06-13 01:53:12 |
Message-ID: | GNELIHDDFBOCMGBFGEFOCELJCCAA.chriskl@familyhealth.com.au |
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Thread: | |
Lists: | pgsql-sql |
> Thanks for the response and guidelines. I think that I figured out
> something concerning indices and foreign keys...It seems like a non-unique
> index is automatically getting created for my foreign keys. Does
> this make
> sense?
Hmm...nope. Creating a foreign key doesn't create an index. However,
creating a primary key does - sure you're not getting mixed up there?
> I got this hunch from this function I found while peeking through the
> archives today...
> pg_get_indexdef(oid); // oid should be the oid of the index you are
> investigating
>
> Using this I discovered some indices on foreign keys that I didn't
> explicitly create.
Postgres doesn't create indices for you, unless as part of a primary key or
unique constraint.
Chris
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